1 from __future__ import unicode_literals
2
3 import re
4
5 from .common import InfoExtractor
6 from ..compat import (
7 compat_HTTPError,
8 compat_str,
9 compat_urlparse,
10 )
11 from ..utils import (
12 ExtractorError,
13 int_or_none,
14 urlencode_postdata,
15 )
16
17
18 class LyndaBaseIE(InfoExtractor):
19 _SIGNIN_URL = 'https://www.lynda.com/signin'
20 _PASSWORD_URL = 'https://www.lynda.com/signin/password'
21 _USER_URL = 'https://www.lynda.com/signin/user'
22 _ACCOUNT_CREDENTIALS_HINT = 'Use --username and --password options to provide lynda.com account credentials.'
23 _NETRC_MACHINE = 'lynda'
24
25 def _real_initialize(self):
26 self._login()
27
28 @staticmethod
29 def _check_error(json_string, key_or_keys):
30 keys = [key_or_keys] if isinstance(key_or_keys, compat_str) else key_or_keys
31 for key in keys:
32 error = json_string.get(key)
33 if error:
34 raise ExtractorError('Unable to login: %s' % error, expected=True)
35
36 def _login_step(self, form_html, fallback_action_url, extra_form_data, note, referrer_url):
37 action_url = self._search_regex(
38 r'<form[^>]+action=(["\'])(?P<url>.+?)\1', form_html,
39 'post url', default=fallback_action_url, group='url')
40
41 if not action_url.startswith('http'):
42 action_url = compat_urlparse.urljoin(self._SIGNIN_URL, action_url)
43
44 form_data = self._hidden_inputs(form_html)
45 form_data.update(extra_form_data)
46
47 try:
48 response = self._download_json(
49 action_url, None, note,
50 data=urlencode_postdata(form_data),
51 headers={
52 'Referer': referrer_url,
53 'X-Requested-With': 'XMLHttpRequest',
54 })
55 except ExtractorError as e:
56 if isinstance(e.cause, compat_HTTPError) and e.cause.code == 500:
57 response = self._parse_json(e.cause.read().decode('utf-8'), None)
58 self._check_error(response, ('email', 'password'))
59 raise
60
61 self._check_error(response, 'ErrorMessage')
62
63 return response, action_url
64
65 def _login(self):
66 username, password = self._get_login_info()
67 if username is None:
68 return
69
70 # Step 1: download signin page
71 signin_page = self._download_webpage(
72 self._SIGNIN_URL, None, 'Downloading signin page')
73
74 # Already logged in
75 if any(re.search(p, signin_page) for p in (
76 r'isLoggedIn\s*:\s*true', r'logout\.aspx', r'>Log out<')):
77 return
78
79 # Step 2: submit email
80 signin_form = self._search_regex(
81 r'(?s)(<form[^>]+data-form-name=["\']signin["\'][^>]*>.+?</form>)',
82 signin_page, 'signin form')
83 signin_page, signin_url = self._login_step(
84 signin_form, self._PASSWORD_URL, {'email': username},
85 'Submitting email', self._SIGNIN_URL)
86
87 # Step 3: submit password
88 password_form = signin_page['body']
89 self._login_step(
90 password_form, self._USER_URL, {'email': username, 'password': password},
91 'Submitting password', signin_url)
92
93
94 class LyndaIE(LyndaBaseIE):
95 IE_NAME = 'lynda'
96 IE_DESC = 'lynda.com videos'
97 _VALID_URL = r'https?://(?:www\.)?lynda\.com/(?:[^/]+/[^/]+/(?P<course_id>\d+)|player/embed)/(?P<id>\d+)'
98
99 _TIMECODE_REGEX = r'\[(?P<timecode>\d+:\d+:\d+[\.,]\d+)\]'
100
101 _TESTS = [{
102 'url': 'https://www.lynda.com/Bootstrap-tutorials/Using-exercise-files/110885/114408-4.html',
103 # md5 is unstable
104 'info_dict': {
105 'id': '114408',
106 'ext': 'mp4',
107 'title': 'Using the exercise files',
108 'duration': 68
109 }
110 }, {
111 'url': 'https://www.lynda.com/player/embed/133770?tr=foo=1;bar=g;fizz=rt&fs=0',
112 'only_matching': True,
113 }]
114
115 def _raise_unavailable(self, video_id):
116 self.raise_login_required(
117 'Video %s is only available for members' % video_id)
118
119 def _real_extract(self, url):
120 mobj = re.match(self._VALID_URL, url)
121 video_id = mobj.group('id')
122 course_id = mobj.group('course_id')
123
124 query = {
125 'videoId': video_id,
126 'type': 'video',
127 }
128
129 video = self._download_json(
130 'https://www.lynda.com/ajax/player', video_id,
131 'Downloading video JSON', fatal=False, query=query)
132
133 # Fallback scenario
134 if not video:
135 query['courseId'] = course_id
136
137 play = self._download_json(
138 'https://www.lynda.com/ajax/course/%s/%s/play'
139 % (course_id, video_id), video_id, 'Downloading play JSON')
140
141 if not play:
142 self._raise_unavailable(video_id)
143
144 formats = []
145 for formats_dict in play:
146 urls = formats_dict.get('urls')
147 if not isinstance(urls, dict):
148 continue
149 cdn = formats_dict.get('name')
150 for format_id, format_url in urls.items():
151 if not format_url:
152 continue
153 formats.append({
154 'url': format_url,
155 'format_id': '%s-%s' % (cdn, format_id) if cdn else format_id,
156 'height': int_or_none(format_id),
157 })
158 self._sort_formats(formats)
159
160 conviva = self._download_json(
161 'https://www.lynda.com/ajax/player/conviva', video_id,
162 'Downloading conviva JSON', query=query)
163
164 return {
165 'id': video_id,
166 'title': conviva['VideoTitle'],
167 'description': conviva.get('VideoDescription'),
168 'release_year': int_or_none(conviva.get('ReleaseYear')),
169 'duration': int_or_none(conviva.get('Duration')),
170 'creator': conviva.get('Author'),
171 'formats': formats,
172 }
173
174 if 'Status' in video:
175 raise ExtractorError(
176 'lynda returned error: %s' % video['Message'], expected=True)
177
178 if video.get('HasAccess') is False:
179 self._raise_unavailable(video_id)
180
181 video_id = compat_str(video.get('ID') or video_id)
182 duration = int_or_none(video.get('DurationInSeconds'))
183 title = video['Title']
184
185 formats = []
186
187 fmts = video.get('Formats')
188 if fmts:
189 formats.extend([{
190 'url': f['Url'],
191 'ext': f.get('Extension'),
192 'width': int_or_none(f.get('Width')),
193 'height': int_or_none(f.get('Height')),
194 'filesize': int_or_none(f.get('FileSize')),
195 'format_id': compat_str(f.get('Resolution')) if f.get('Resolution') else None,
196 } for f in fmts if f.get('Url')])
197
198 prioritized_streams = video.get('PrioritizedStreams')
199 if prioritized_streams:
200 for prioritized_stream_id, prioritized_stream in prioritized_streams.items():
201 formats.extend([{
202 'url': video_url,
203 'height': int_or_none(format_id),
204 'format_id': '%s-%s' % (prioritized_stream_id, format_id),
205 } for format_id, video_url in prioritized_stream.items()])
206
207 self._check_formats(formats, video_id)
208 self._sort_formats(formats)
209
210 subtitles = self.extract_subtitles(video_id)
211
212 return {
213 'id': video_id,
214 'title': title,
215 'duration': duration,
216 'subtitles': subtitles,
217 'formats': formats
218 }
219
220 def _fix_subtitles(self, subs):
221 srt = ''
222 seq_counter = 0
223 for pos in range(0, len(subs) - 1):
224 seq_current = subs[pos]
225 m_current = re.match(self._TIMECODE_REGEX, seq_current['Timecode'])
226 if m_current is None:
227 continue
228 seq_next = subs[pos + 1]
229 m_next = re.match(self._TIMECODE_REGEX, seq_next['Timecode'])
230 if m_next is None:
231 continue
232 appear_time = m_current.group('timecode')
233 disappear_time = m_next.group('timecode')
234 text = seq_current['Caption'].strip()
235 if text:
236 seq_counter += 1
237 srt += '%s\r\n%s --> %s\r\n%s\r\n\r\n' % (seq_counter, appear_time, disappear_time, text)
238 if srt:
239 return srt
240
241 def _get_subtitles(self, video_id):
242 url = 'https://www.lynda.com/ajax/player?videoId=%s&type=transcript' % video_id
243 subs = self._download_json(url, None, False)
244 if subs:
245 return {'en': [{'ext': 'srt', 'data': self._fix_subtitles(subs)}]}
246 else:
247 return {}
248
249
250 class LyndaCourseIE(LyndaBaseIE):
251 IE_NAME = 'lynda:course'
252 IE_DESC = 'lynda.com online courses'
253
254 # Course link equals to welcome/introduction video link of same course
255 # We will recognize it as course link
256 _VALID_URL = r'https?://(?:www|m)\.lynda\.com/(?P<coursepath>[^/]+/[^/]+/(?P<courseid>\d+))-\d\.html'
257
258 def _real_extract(self, url):
259 mobj = re.match(self._VALID_URL, url)
260 course_path = mobj.group('coursepath')
261 course_id = mobj.group('courseid')
262
263 course = self._download_json(
264 'https://www.lynda.com/ajax/player?courseId=%s&type=course' % course_id,
265 course_id, 'Downloading course JSON')
266
267 if course.get('Status') == 'NotFound':
268 raise ExtractorError(
269 'Course %s does not exist' % course_id, expected=True)
270
271 unaccessible_videos = 0
272 entries = []
273
274 # Might want to extract videos right here from video['Formats'] as it seems 'Formats' is not provided
275 # by single video API anymore
276
277 for chapter in course['Chapters']:
278 for video in chapter.get('Videos', []):
279 if video.get('HasAccess') is False:
280 unaccessible_videos += 1
281 continue
282 video_id = video.get('ID')
283 if video_id:
284 entries.append({
285 '_type': 'url_transparent',
286 'url': 'https://www.lynda.com/%s/%s-4.html' % (course_path, video_id),
287 'ie_key': LyndaIE.ie_key(),
288 'chapter': chapter.get('Title'),
289 'chapter_number': int_or_none(chapter.get('ChapterIndex')),
290 'chapter_id': compat_str(chapter.get('ID')),
291 })
292
293 if unaccessible_videos > 0:
294 self._downloader.report_warning(
295 '%s videos are only available for members (or paid members) and will not be downloaded. '
296 % unaccessible_videos + self._ACCOUNT_CREDENTIALS_HINT)
297
298 course_title = course.get('Title')
299 course_description = course.get('Description')
300
301 return self.playlist_result(entries, course_id, course_title, course_description)
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